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pakai segitiga pascal --> 1 3 3 1
(2x + y)³ = 1 (2x)³ (y)⁰ + 3 (2x)² (y)¹ + 3 (2x)¹ (y)² + 1 (2x)⁰ (y)³
(2x + y)³ = 1 (8x³) + 3 (4x²)(y) + 3 (2x)(y²) + 1 (y³)
(2x + y)³ = 8x³ + 12x²y + 6xy² + y³
Jawabannya D
Nomor 8
(3y³ × 4y⁴) : 6y⁵
= (3×4 y³⁺⁴) : 6y⁵
= 12y⁷ : 6y⁵
= (12:6) y⁷⁻⁵
= 2y²
Jawaban B